So I would like to change two things in the basic skin to make it more to my liking but don't really know how. Firstly, I would like to know how to change the background picture and secondly i would like to know if there's a way to set the transparency for those boxes in the attached screenshot below. Want to change the bg pic to solid grey color and make the boxes almost fully transparent. If anyone could help me with it, that would be great.